Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Architecture specific parts of the Floppy driver |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file "COPYING" in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | * Copyright (C) 1995 |
| 9 | */ |
Paul Mackerras | c55377e | 2005-11-14 17:22:01 +1100 | [diff] [blame] | 10 | #ifndef __ASM_POWERPC_FLOPPY_H |
| 11 | #define __ASM_POWERPC_FLOPPY_H |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 12 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <asm/machdep.h> |
| 15 | |
Paul Mackerras | c55377e | 2005-11-14 17:22:01 +1100 | [diff] [blame] | 16 | #define fd_inb(port) inb_p(port) |
| 17 | #define fd_outb(value,port) outb_p(value,port) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | #define fd_enable_dma() enable_dma(FLOPPY_DMA) |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 20 | #define fd_disable_dma() fd_ops->_disable_dma(FLOPPY_DMA) |
| 21 | #define fd_free_dma() fd_ops->_free_dma(FLOPPY_DMA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #define fd_clear_dma_ff() clear_dma_ff(FLOPPY_DMA) |
Paul Mackerras | c55377e | 2005-11-14 17:22:01 +1100 | [diff] [blame] | 23 | #define fd_set_dma_mode(mode) set_dma_mode(FLOPPY_DMA, mode) |
| 24 | #define fd_set_dma_count(count) set_dma_count(FLOPPY_DMA, count) |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 25 | #define fd_get_dma_residue() fd_ops->_get_dma_residue(FLOPPY_DMA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #define fd_enable_irq() enable_irq(FLOPPY_IRQ) |
| 27 | #define fd_disable_irq() disable_irq(FLOPPY_IRQ) |
| 28 | #define fd_cacheflush(addr,size) /* nothing */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #define fd_free_irq() free_irq(FLOPPY_IRQ, NULL); |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/pci.h> |
Stephen Rothwell | b239cbe | 2006-03-28 14:40:58 +1100 | [diff] [blame] | 32 | #include <asm/ppc-pci.h> /* for ppc64_isabridge_dev */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 34 | #define fd_dma_setup(addr,size,mode,io) fd_ops->_dma_setup(addr,size,mode,io) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 36 | static int fd_request_dma(void); |
| 37 | |
| 38 | struct fd_dma_ops { |
| 39 | void (*_disable_dma)(unsigned int dmanr); |
| 40 | void (*_free_dma)(unsigned int dmanr); |
| 41 | int (*_get_dma_residue)(unsigned int dummy); |
| 42 | int (*_dma_setup)(char *addr, unsigned long size, int mode, int io); |
| 43 | }; |
| 44 | |
| 45 | static int virtual_dma_count; |
| 46 | static int virtual_dma_residue; |
| 47 | static char *virtual_dma_addr; |
| 48 | static int virtual_dma_mode; |
| 49 | static int doing_vdma; |
| 50 | static struct fd_dma_ops *fd_ops; |
| 51 | |
| 52 | static irqreturn_t floppy_hardint(int irq, void *dev_id) |
| 53 | { |
| 54 | unsigned char st; |
| 55 | int lcount; |
| 56 | char *lptr; |
| 57 | |
| 58 | if (!doing_vdma) |
| 59 | return floppy_interrupt(irq, dev_id); |
| 60 | |
| 61 | |
| 62 | st = 1; |
| 63 | for (lcount=virtual_dma_count, lptr=virtual_dma_addr; |
| 64 | lcount; lcount--, lptr++) { |
| 65 | st=inb(virtual_dma_port+4) & 0xa0 ; |
| 66 | if (st != 0xa0) |
| 67 | break; |
| 68 | if (virtual_dma_mode) |
| 69 | outb_p(*lptr, virtual_dma_port+5); |
| 70 | else |
| 71 | *lptr = inb_p(virtual_dma_port+5); |
| 72 | } |
| 73 | virtual_dma_count = lcount; |
| 74 | virtual_dma_addr = lptr; |
| 75 | st = inb(virtual_dma_port+4); |
| 76 | |
| 77 | if (st == 0x20) |
| 78 | return IRQ_HANDLED; |
| 79 | if (!(st & 0x20)) { |
| 80 | virtual_dma_residue += virtual_dma_count; |
| 81 | virtual_dma_count=0; |
| 82 | doing_vdma = 0; |
| 83 | floppy_interrupt(irq, dev_id); |
| 84 | return IRQ_HANDLED; |
| 85 | } |
| 86 | return IRQ_HANDLED; |
| 87 | } |
| 88 | |
| 89 | static void vdma_disable_dma(unsigned int dummy) |
| 90 | { |
| 91 | doing_vdma = 0; |
| 92 | virtual_dma_residue += virtual_dma_count; |
| 93 | virtual_dma_count=0; |
| 94 | } |
| 95 | |
| 96 | static void vdma_nop(unsigned int dummy) |
| 97 | { |
| 98 | } |
| 99 | |
| 100 | |
| 101 | static int vdma_get_dma_residue(unsigned int dummy) |
| 102 | { |
| 103 | return virtual_dma_count + virtual_dma_residue; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | static int fd_request_irq(void) |
| 108 | { |
| 109 | if (can_use_virtual_dma) |
| 110 | return request_irq(FLOPPY_IRQ, floppy_hardint, |
| 111 | IRQF_DISABLED, "floppy", NULL); |
| 112 | else |
| 113 | return request_irq(FLOPPY_IRQ, floppy_interrupt, |
| 114 | IRQF_DISABLED, "floppy", NULL); |
| 115 | } |
| 116 | |
| 117 | static int vdma_dma_setup(char *addr, unsigned long size, int mode, int io) |
| 118 | { |
| 119 | doing_vdma = 1; |
| 120 | virtual_dma_port = io; |
| 121 | virtual_dma_mode = (mode == DMA_MODE_WRITE); |
| 122 | virtual_dma_addr = addr; |
| 123 | virtual_dma_count = size; |
| 124 | virtual_dma_residue = 0; |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static int hard_dma_setup(char *addr, unsigned long size, int mode, int io) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | { |
| 130 | static unsigned long prev_size; |
| 131 | static dma_addr_t bus_addr = 0; |
| 132 | static char *prev_addr; |
| 133 | static int prev_dir; |
| 134 | int dir; |
| 135 | |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 136 | doing_vdma = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | dir = (mode == DMA_MODE_READ) ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE; |
| 138 | |
| 139 | if (bus_addr |
| 140 | && (addr != prev_addr || size != prev_size || dir != prev_dir)) { |
| 141 | /* different from last time -- unmap prev */ |
Stephen Rothwell | b239cbe | 2006-03-28 14:40:58 +1100 | [diff] [blame] | 142 | pci_unmap_single(ppc64_isabridge_dev, bus_addr, prev_size, prev_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | bus_addr = 0; |
| 144 | } |
| 145 | |
Paul Mackerras | c55377e | 2005-11-14 17:22:01 +1100 | [diff] [blame] | 146 | if (!bus_addr) /* need to map it */ |
Stephen Rothwell | b239cbe | 2006-03-28 14:40:58 +1100 | [diff] [blame] | 147 | bus_addr = pci_map_single(ppc64_isabridge_dev, addr, size, dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | /* remember this one as prev */ |
| 150 | prev_addr = addr; |
| 151 | prev_size = size; |
| 152 | prev_dir = dir; |
| 153 | |
| 154 | fd_clear_dma_ff(); |
| 155 | fd_cacheflush(addr, size); |
| 156 | fd_set_dma_mode(mode); |
| 157 | set_dma_addr(FLOPPY_DMA, bus_addr); |
| 158 | fd_set_dma_count(size); |
| 159 | virtual_dma_port = io; |
| 160 | fd_enable_dma(); |
| 161 | |
| 162 | return 0; |
| 163 | } |
| 164 | |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 165 | static struct fd_dma_ops real_dma_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 167 | ._disable_dma = disable_dma, |
| 168 | ._free_dma = free_dma, |
| 169 | ._get_dma_residue = get_dma_residue, |
| 170 | ._dma_setup = hard_dma_setup |
| 171 | }; |
| 172 | |
| 173 | static struct fd_dma_ops virt_dma_ops = |
| 174 | { |
| 175 | ._disable_dma = vdma_disable_dma, |
| 176 | ._free_dma = vdma_nop, |
| 177 | ._get_dma_residue = vdma_get_dma_residue, |
| 178 | ._dma_setup = vdma_dma_setup |
| 179 | }; |
| 180 | |
Al Viro | 1be9ab0 | 2007-03-14 09:20:00 +0000 | [diff] [blame^] | 181 | static int fd_request_dma(void) |
Pavel Fedin | 9ea8b7c | 2007-01-29 15:13:03 +0300 | [diff] [blame] | 182 | { |
| 183 | if (can_use_virtual_dma & 1) { |
| 184 | fd_ops = &virt_dma_ops; |
| 185 | return 0; |
| 186 | } |
| 187 | else { |
| 188 | fd_ops = &real_dma_ops; |
| 189 | return request_dma(FLOPPY_DMA, "floppy"); |
| 190 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static int FDC1 = 0x3f0; |
| 194 | static int FDC2 = -1; |
| 195 | |
| 196 | /* |
| 197 | * Again, the CMOS information not available |
| 198 | */ |
| 199 | #define FLOPPY0_TYPE 6 |
| 200 | #define FLOPPY1_TYPE 0 |
| 201 | |
| 202 | #define N_FDC 2 /* Don't change this! */ |
| 203 | #define N_DRIVE 8 |
| 204 | |
| 205 | #define FLOPPY_MOTOR_MASK 0xf0 |
| 206 | |
| 207 | /* |
| 208 | * The PowerPC has no problems with floppy DMA crossing 64k borders. |
| 209 | */ |
| 210 | #define CROSS_64KB(a,s) (0) |
| 211 | |
| 212 | #define EXTRA_FLOPPY_PARAMS |
| 213 | |
Arnd Bergmann | 88ced03 | 2005-12-16 22:43:46 +0100 | [diff] [blame] | 214 | #endif /* __KERNEL__ */ |
Paul Mackerras | c55377e | 2005-11-14 17:22:01 +1100 | [diff] [blame] | 215 | #endif /* __ASM_POWERPC_FLOPPY_H */ |